الإتاحة: https://methods.sagepub.com/video/working-with-satellite-data-for-earth-observation-pixalytics
الإتاحة: https://methods.sagepub.com/video/an-introduction-to-spatial-data-and-geographic-information-systems
المساهمون: John Agnew, David N. Livingstone
الإتاحة: http://sk.sagepub.com/reference/hdbk_geoknowledge